COP coil recommendation
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Junior User
Joined: Nov 2004
Posts: 79
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COP coil recommendation
At 142000+ miles I am seeing signs it is time for new coils (slightly rougher idle and slightly lower fuel economy). Plugs were done previously.
Many people in the past have had good experiences with some of the sellers on E-bay. It looks like a full set is currently selling for between 55 - 75$.
Any recommendations? Sellers or brands to stay away from?
Thx
Many people in the past have had good experiences with some of the sellers on E-bay. It looks like a full set is currently selling for between 55 - 75$.
Any recommendations? Sellers or brands to stay away from?
Thx
Postmaster
Joined: Sep 2010
Posts: 3,472
Likes: 2
From: Southern Cal
At 142000+ miles I am seeing signs it is time for new coils (slightly rougher idle and slightly lower fuel economy). Plugs were done previously.
Many people in the past have had good experiences with some of the sellers on E-bay. It looks like a full set is currently selling for between 55 - 75$.
Any recommendations? Sellers or brands to stay away from?
Thx
Many people in the past have had good experiences with some of the sellers on E-bay. It looks like a full set is currently selling for between 55 - 75$.
Any recommendations? Sellers or brands to stay away from?
Thx
Usually they either work or don't. They don't loss their strength of spark due to usage. It's not like an alternator with brushes to wear out. It a coil that's energized, not moving parts.
Have you checked you air filter, MAF, IAC, vacuum leaks in pcv elbow, etc.
How old are your plugs?
Sure the recommendation to change is every 100k max but don't trust them to be efficient that long.
With 310k, the engine purrs with 6 out of 8 COPs original.
Laughing Gas
Joined: Oct 2007
Posts: 965
Likes: 105
I always inspect the boots for cracks and replace all of them if I find even one that is bad.
As was said , the coils have no moving parts , and either work or don't.
They can leak off as cracking from age occurs, and by that I mean the spark shorts to surrounding areas .
As was said , the coils have no moving parts , and either work or don't.
They can leak off as cracking from age occurs, and by that I mean the spark shorts to surrounding areas .
Fleet Owner
Joined: Apr 2008
Posts: 24,322
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From: 0,0,1
There is a set of 8 on sale for the next 3 days for only $45.99 with free shipping. Hard to go wrong at that price.
http://www.ebay.com/itm/New-Complete-ignition-coils-for-Ford-Lincoln-Mercury-DG508-SET-OF-8-4-6L-5-4L-V8-/260936449548?pt=Motors_Car_Truck_Parts_Accessories&fits=Year%3A2004%7CModel%3AExpedition&hash=item3cc1063e0c&vxp=mtr
http://www.ebay.com/itm/New-Complete-ignition-coils-for-Ford-Lincoln-Mercury-DG508-SET-OF-8-4-6L-5-4L-V8-/260936449548?pt=Motors_Car_Truck_Parts_Accessories&fits=Year%3A2004%7CModel%3AExpedition&hash=item3cc1063e0c&vxp=mtr
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